Bayes' theorem is primarily used to: MCQ with Answer and Explanation

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Bayes' theorem is primarily used to:

A. Calculate the probability of the union of events

B. Determine if two events are mutually exclusive

C. Compute the expected value of a random variable

D. Update the probability of a hypothesis based on new evidence

Answer: Option D

Solution (By JKSSB Mock Tests)

Bayes' theorem allows revising prior probabilities of hypotheses in light of new data or evidence, making it fundamental in statistical inference and decision-making under uncertainty.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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Which method of collecting primary data is most suitable when informants are illiterate and the investigator wants to ensure high accuracy?

A. Mailed questionnaire

B. Information through local correspondents

C. Telephone interview

D. Direct personal interview

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Correct Answer: Option D

Explanation:
Direct personal interview allows the enumerator to clarify questions and probe for accurate responses, making it ideal for illiterate respondents.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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If a population has a high proportion of young people, the crude death rate may be low even if age-specific rates are high. This is an example of:

A. Direct standardization

B. Reverse causality

C. Age structure effect

D. Sampling error

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Correct Answer: Option C

Explanation:
A young population has fewer old people where mortality is high, thus CDR can be low.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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Age-Specific Fertility Rate (ASFR) for age group 20-24 is calculated as:

A. Births to women 20-24 / Married women 20-24 × 1,000

B. Births to women 20-24 / Total population × 1,000

C. Births to women 20-24 / Total women 20-24 × 1,000

D. Total births / Women 20-24 × 1,000

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Correct Answer: Option C

Explanation:
ASFR isolates fertility behavior within specific age groups: (Number of births to women in age group / Mid-year population of women in that age group) × 1,000, enabling detailed fertility pattern analysis.

This question belongs to: Accountancy and Statistics Statistics

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